hooking up a multi-axis MPG on mesa 7i92 w/7i77 and Qtdragon

I am looking for recommendations on a proper hook up of a multi axis mpg. I have my inputs for axis select and x1, x10 and x100 but I am not sure about the a and b as well as questions of proper HAL to make it work correctly.
The computer has the 8125 network card which forced me to use debian 12 and linuxcnc 2.9, following Rod's instructions that has all worked correctly. I also have a light curtain to stop the axis and spindle, however the spindle does not pause and then restart. Has anyone found a good fix for the pause and restart of the spindle in QTdragon?

There is a MPG example in the main linuxcnc docs that uses the parallel port.
Using the MESA MPG inputs is similar and I fully documented hardware and software for a 7i76e in my plasma build here
forum.linuxcnc.org/show-your-stuff/32029...utter-build?start=20

I have attached a 6 axis example. Ignore all the buttons etc, Note I use binary coded switches to reduce the number of pins required.
For this I needed to upgrade from mux4 to mux8. This gets a it convoluted in hal becasue we need to convert from floats to S32 values

I'm glad you got your network card running in Bookworm and the new 6.1 kernel gives the best latency ever!
 

andypugh wrote:

It might be worth looking at a 7i73 (fit it inside the pendant) to simplify the wiring. You then have an easily-replaced CAT5 cable from the 7i77 to the pendant.

Yes I agree. You still need to code the MPG though.
Full disclosure I use a 433 MHz wireless pendant so I don't need any wires at all